3 * Copyright (c) 2011, Microsoft Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
21 * K. Y. Srinivasan <kys@microsoft.com>
28 #include <linux/types.h>
31 * An implementation of HyperV key value pair (KVP) functionality for Linux.
34 * Copyright (C) 2010, Novell, Inc.
35 * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
40 * Maximum value size - used for both key names and value data, and includes
41 * any applicable NULL terminators.
43 * Note: This limit is somewhat arbitrary, but falls easily within what is
44 * supported for all native guests (back to Win 2000) and what is reasonable
45 * for the IC KVP exchange functionality. Note that Windows Me/98/95 are
46 * limited to 255 character key names.
48 * MSDN recommends not storing data values larger than 2048 bytes in the
51 * Note: This value is used in defining the KVP exchange message - this value
52 * cannot be modified without affecting the message size and compatibility.
56 * bytes, including any null terminators
58 #define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
62 * Maximum key size - the registry limit for the length of an entry name
63 * is 256 characters, including the null terminator
66 #define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
69 * In Linux, we implement the KVP functionality in two components:
70 * 1) The kernel component which is packaged as part of the hv_utils driver
71 * is responsible for communicating with the host and responsible for
72 * implementing the host/guest protocol. 2) A user level daemon that is
73 * responsible for data gathering.
75 * Host/Guest Protocol: The host iterates over an index and expects the guest
76 * to assign a key name to the index and also return the value corresponding to
77 * the key. The host will have atmost one KVP transaction outstanding at any
78 * given point in time. The host side iteration stops when the guest returns
79 * an error. Microsoft has specified the following mapping of key names to
80 * host specified index:
83 * 0 FullyQualifiedDomainName
84 * 1 IntegrationServicesVersion
85 * 2 NetworkAddressIPv4
86 * 3 NetworkAddressIPv6
92 * 9 ProcessorArchitecture
94 * The Windows host expects the Key Name and Key Value to be encoded in utf16.
96 * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
97 * data gathering functionality in a user mode daemon. The user level daemon
98 * is also responsible for binding the key name to the index as well. The
99 * kernel and user-level daemon communicate using a connector channel.
101 * The user mode component first registers with the
102 * the kernel component. Subsequently, the kernel component requests, data
103 * for the specified keys. In response to this message the user mode component
104 * fills in the value corresponding to the specified key. We overload the
105 * sequence field in the cn_msg header to define our KVP message types.
108 * The kernel component simply acts as a conduit for communication between the
109 * Windows host and the user-level daemon. The kernel component passes up the
110 * index received from the Host to the user-level daemon. If the index is
111 * valid (supported), the corresponding key as well as its
112 * value (both are strings) is returned. If the index is invalid
113 * (not supported), a NULL key string is returned.
118 * Registry value types.
125 enum hv_kvp_exchg_op {
131 KVP_OP_COUNT /* Number of operations, must be last. */
134 enum hv_kvp_exchg_pool {
135 KVP_POOL_EXTERNAL = 0,
138 KVP_POOL_AUTO_EXTERNAL,
139 KVP_POOL_AUTO_INTERNAL,
140 KVP_POOL_COUNT /* Number of pools, must be last. */
147 } __attribute__((packed));
149 struct hv_kvp_exchg_msg_value {
153 __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
155 __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
159 } __attribute__((packed));
161 struct hv_kvp_msg_enumerate {
163 struct hv_kvp_exchg_msg_value data;
164 } __attribute__((packed));
166 struct hv_kvp_msg_get {
167 struct hv_kvp_exchg_msg_value data;
170 struct hv_kvp_msg_set {
171 struct hv_kvp_exchg_msg_value data;
174 struct hv_kvp_msg_delete {
176 __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
179 struct hv_kvp_register {
180 __u8 version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
184 struct hv_kvp_hdr kvp_hdr;
186 struct hv_kvp_msg_get kvp_get;
187 struct hv_kvp_msg_set kvp_set;
188 struct hv_kvp_msg_delete kvp_delete;
189 struct hv_kvp_msg_enumerate kvp_enum_data;
190 struct hv_kvp_register kvp_register;
192 } __attribute__((packed));
195 #include <linux/scatterlist.h>
196 #include <linux/list.h>
197 #include <linux/uuid.h>
198 #include <linux/timer.h>
199 #include <linux/workqueue.h>
200 #include <linux/completion.h>
201 #include <linux/device.h>
202 #include <linux/mod_devicetable.h>
205 #define MAX_PAGE_BUFFER_COUNT 19
206 #define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
208 #pragma pack(push, 1)
210 /* Single-page buffer */
211 struct hv_page_buffer {
217 /* Multiple-page buffer */
218 struct hv_multipage_buffer {
219 /* Length and Offset determines the # of pfns in the array */
222 u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
225 /* 0x18 includes the proprietary packet header */
226 #define MAX_PAGE_BUFFER_PACKET (0x18 + \
227 (sizeof(struct hv_page_buffer) * \
228 MAX_PAGE_BUFFER_COUNT))
229 #define MAX_MULTIPAGE_BUFFER_PACKET (0x18 + \
230 sizeof(struct hv_multipage_buffer))
235 struct hv_ring_buffer {
236 /* Offset in bytes from the start of ring data below */
239 /* Offset in bytes from the start of ring data below */
244 /* Pad it to PAGE_SIZE so that data starts on page boundary */
248 * The interrupt_mask field is used only for channels but since our
249 * vmbus connection also uses this data structure and its data starts
250 * here, we commented out this field.
254 * Ring data starts here + RingDataStartOffset
255 * !!! DO NOT place any fields below this !!!
260 struct hv_ring_buffer_info {
261 struct hv_ring_buffer *ring_buffer;
262 u32 ring_size; /* Include the shared header */
263 spinlock_t ring_lock;
265 u32 ring_datasize; /* < ring_size */
266 u32 ring_data_startoffset;
269 struct hv_ring_buffer_debug_info {
270 u32 current_interrupt_mask;
271 u32 current_read_index;
272 u32 current_write_index;
273 u32 bytes_avail_toread;
274 u32 bytes_avail_towrite;
280 * hv_get_ringbuffer_availbytes()
282 * Get number of bytes available to read and to write to
283 * for the specified ring buffer
286 hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
287 u32 *read, u32 *write)
289 u32 read_loc, write_loc, dsize;
291 smp_read_barrier_depends();
293 /* Capture the read/write indices before they changed */
294 read_loc = rbi->ring_buffer->read_index;
295 write_loc = rbi->ring_buffer->write_index;
296 dsize = rbi->ring_datasize;
298 *write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
299 read_loc - write_loc;
300 *read = dsize - *write;
305 * We use the same version numbering for all Hyper-V modules.
307 * Definition of versioning is as follows;
309 * Major Number Changes for these scenarios;
310 * 1. When a new version of Windows Hyper-V
312 * 2. A Major change has occurred in the
314 * (For example the merge for the first time
315 * into the kernel) Every time the Major Number
316 * changes, the Revision number is reset to 0.
317 * Minor Number Changes when new functionality is added
318 * to the Linux IC's that is not a bug fix.
320 * 3.1 - Added completed hv_utils driver. Shutdown/Heartbeat/Timesync
322 #define HV_DRV_VERSION "3.1"
326 * A revision number of vmbus that is used for ensuring both ends on a
327 * partition are using compatible versions.
329 #define VMBUS_REVISION_NUMBER 13
331 /* Make maximum size of pipe payload of 16K */
332 #define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
334 /* Define PipeMode values. */
335 #define VMBUS_PIPE_TYPE_BYTE 0x00000000
336 #define VMBUS_PIPE_TYPE_MESSAGE 0x00000004
338 /* The size of the user defined data buffer for non-pipe offers. */
339 #define MAX_USER_DEFINED_BYTES 120
341 /* The size of the user defined data buffer for pipe offers. */
342 #define MAX_PIPE_USER_DEFINED_BYTES 116
345 * At the center of the Channel Management library is the Channel Offer. This
346 * struct contains the fundamental information about an offer.
348 struct vmbus_channel_offer {
351 u64 int_latency; /* in 100ns units */
353 u32 server_ctx_size; /* in bytes */
355 u16 mmio_megabytes; /* in bytes * 1024 * 1024 */
358 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
360 unsigned char user_def[MAX_USER_DEFINED_BYTES];
365 * The following sructure is an integrated pipe protocol, which
366 * is implemented on top of standard user-defined data. Pipe
367 * clients have MAX_PIPE_USER_DEFINED_BYTES left for their own
372 unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];
379 #define VMBUS_CHANNEL_ENUMERATE_DEVICE_INTERFACE 1
380 #define VMBUS_CHANNEL_SERVER_SUPPORTS_TRANSFER_PAGES 2
381 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
382 #define VMBUS_CHANNEL_NAMED_PIPE_MODE 0x10
383 #define VMBUS_CHANNEL_LOOPBACK_OFFER 0x100
384 #define VMBUS_CHANNEL_PARENT_OFFER 0x200
385 #define VMBUS_CHANNEL_REQUEST_MONITORED_NOTIFICATION 0x400
387 struct vmpacket_descriptor {
395 struct vmpacket_header {
396 u32 prev_pkt_start_offset;
397 struct vmpacket_descriptor descriptor;
400 struct vmtransfer_page_range {
405 struct vmtransfer_page_packet_header {
406 struct vmpacket_descriptor d;
408 bool sender_owns_set;
411 struct vmtransfer_page_range ranges[1];
414 struct vmgpadl_packet_header {
415 struct vmpacket_descriptor d;
420 struct vmadd_remove_transfer_page_set {
421 struct vmpacket_descriptor d;
428 * This structure defines a range in guest physical space that can be made to
429 * look virtually contiguous.
438 * This is the format for an Establish Gpadl packet, which contains a handle by
439 * which this GPADL will be known and a set of GPA ranges associated with it.
440 * This can be converted to a MDL by the guest OS. If there are multiple GPA
441 * ranges, then the resulting MDL will be "chained," representing multiple VA
444 struct vmestablish_gpadl {
445 struct vmpacket_descriptor d;
448 struct gpa_range range[1];
452 * This is the format for a Teardown Gpadl packet, which indicates that the
453 * GPADL handle in the Establish Gpadl packet will never be referenced again.
455 struct vmteardown_gpadl {
456 struct vmpacket_descriptor d;
458 u32 reserved; /* for alignment to a 8-byte boundary */
462 * This is the format for a GPA-Direct packet, which contains a set of GPA
463 * ranges, in addition to commands and/or data.
465 struct vmdata_gpa_direct {
466 struct vmpacket_descriptor d;
469 struct gpa_range range[1];
472 /* This is the format for a Additional Data Packet. */
473 struct vmadditional_data {
474 struct vmpacket_descriptor d;
478 unsigned char data[1];
481 union vmpacket_largest_possible_header {
482 struct vmpacket_descriptor simple_hdr;
483 struct vmtransfer_page_packet_header xfer_page_hdr;
484 struct vmgpadl_packet_header gpadl_hdr;
485 struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
486 struct vmestablish_gpadl establish_gpadl_hdr;
487 struct vmteardown_gpadl teardown_gpadl_hdr;
488 struct vmdata_gpa_direct data_gpa_direct_hdr;
491 #define VMPACKET_DATA_START_ADDRESS(__packet) \
492 (void *)(((unsigned char *)__packet) + \
493 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
495 #define VMPACKET_DATA_LENGTH(__packet) \
496 ((((struct vmpacket_descriptor)__packet)->len8 - \
497 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
499 #define VMPACKET_TRANSFER_MODE(__packet) \
500 (((struct IMPACT)__packet)->type)
502 enum vmbus_packet_type {
503 VM_PKT_INVALID = 0x0,
505 VM_PKT_ADD_XFER_PAGESET = 0x2,
506 VM_PKT_RM_XFER_PAGESET = 0x3,
507 VM_PKT_ESTABLISH_GPADL = 0x4,
508 VM_PKT_TEARDOWN_GPADL = 0x5,
509 VM_PKT_DATA_INBAND = 0x6,
510 VM_PKT_DATA_USING_XFER_PAGES = 0x7,
511 VM_PKT_DATA_USING_GPADL = 0x8,
512 VM_PKT_DATA_USING_GPA_DIRECT = 0x9,
513 VM_PKT_CANCEL_REQUEST = 0xa,
515 VM_PKT_DATA_USING_ADDITIONAL_PKT = 0xc,
516 VM_PKT_ADDITIONAL_DATA = 0xd
519 #define VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED 1
522 /* Version 1 messages */
523 enum vmbus_channel_message_type {
524 CHANNELMSG_INVALID = 0,
525 CHANNELMSG_OFFERCHANNEL = 1,
526 CHANNELMSG_RESCIND_CHANNELOFFER = 2,
527 CHANNELMSG_REQUESTOFFERS = 3,
528 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
529 CHANNELMSG_OPENCHANNEL = 5,
530 CHANNELMSG_OPENCHANNEL_RESULT = 6,
531 CHANNELMSG_CLOSECHANNEL = 7,
532 CHANNELMSG_GPADL_HEADER = 8,
533 CHANNELMSG_GPADL_BODY = 9,
534 CHANNELMSG_GPADL_CREATED = 10,
535 CHANNELMSG_GPADL_TEARDOWN = 11,
536 CHANNELMSG_GPADL_TORNDOWN = 12,
537 CHANNELMSG_RELID_RELEASED = 13,
538 CHANNELMSG_INITIATE_CONTACT = 14,
539 CHANNELMSG_VERSION_RESPONSE = 15,
540 CHANNELMSG_UNLOAD = 16,
541 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
542 CHANNELMSG_VIEWRANGE_ADD = 17,
543 CHANNELMSG_VIEWRANGE_REMOVE = 18,
548 struct vmbus_channel_message_header {
549 enum vmbus_channel_message_type msgtype;
553 /* Query VMBus Version parameters */
554 struct vmbus_channel_query_vmbus_version {
555 struct vmbus_channel_message_header header;
559 /* VMBus Version Supported parameters */
560 struct vmbus_channel_version_supported {
561 struct vmbus_channel_message_header header;
562 bool version_supported;
565 /* Offer Channel parameters */
566 struct vmbus_channel_offer_channel {
567 struct vmbus_channel_message_header header;
568 struct vmbus_channel_offer offer;
571 bool monitor_allocated;
574 /* Rescind Offer parameters */
575 struct vmbus_channel_rescind_offer {
576 struct vmbus_channel_message_header header;
581 * Request Offer -- no parameters, SynIC message contains the partition ID
582 * Set Snoop -- no parameters, SynIC message contains the partition ID
583 * Clear Snoop -- no parameters, SynIC message contains the partition ID
584 * All Offers Delivered -- no parameters, SynIC message contains the partition
586 * Flush Client -- no parameters, SynIC message contains the partition ID
589 /* Open Channel parameters */
590 struct vmbus_channel_open_channel {
591 struct vmbus_channel_message_header header;
593 /* Identifies the specific VMBus channel that is being opened. */
596 /* ID making a particular open request at a channel offer unique. */
599 /* GPADL for the channel's ring buffer. */
600 u32 ringbuffer_gpadlhandle;
602 /* GPADL for the channel's server context save area. */
603 u32 server_contextarea_gpadlhandle;
606 * The upstream ring buffer begins at offset zero in the memory
607 * described by RingBufferGpadlHandle. The downstream ring buffer
608 * follows it at this offset (in pages).
610 u32 downstream_ringbuffer_pageoffset;
612 /* User-specific data to be passed along to the server endpoint. */
613 unsigned char userdata[MAX_USER_DEFINED_BYTES];
616 /* Open Channel Result parameters */
617 struct vmbus_channel_open_result {
618 struct vmbus_channel_message_header header;
624 /* Close channel parameters; */
625 struct vmbus_channel_close_channel {
626 struct vmbus_channel_message_header header;
630 /* Channel Message GPADL */
631 #define GPADL_TYPE_RING_BUFFER 1
632 #define GPADL_TYPE_SERVER_SAVE_AREA 2
633 #define GPADL_TYPE_TRANSACTION 8
636 * The number of PFNs in a GPADL message is defined by the number of
637 * pages that would be spanned by ByteCount and ByteOffset. If the
638 * implied number of PFNs won't fit in this packet, there will be a
639 * follow-up packet that contains more.
641 struct vmbus_channel_gpadl_header {
642 struct vmbus_channel_message_header header;
647 struct gpa_range range[0];
650 /* This is the followup packet that contains more PFNs. */
651 struct vmbus_channel_gpadl_body {
652 struct vmbus_channel_message_header header;
658 struct vmbus_channel_gpadl_created {
659 struct vmbus_channel_message_header header;
665 struct vmbus_channel_gpadl_teardown {
666 struct vmbus_channel_message_header header;
671 struct vmbus_channel_gpadl_torndown {
672 struct vmbus_channel_message_header header;
676 #ifdef VMBUS_FEATURE_PARENT_OR_PEER_MEMORY_MAPPED_INTO_A_CHILD
677 struct vmbus_channel_view_range_add {
678 struct vmbus_channel_message_header header;
679 PHYSICAL_ADDRESS viewrange_base;
680 u64 viewrange_length;
684 struct vmbus_channel_view_range_remove {
685 struct vmbus_channel_message_header header;
686 PHYSICAL_ADDRESS viewrange_base;
691 struct vmbus_channel_relid_released {
692 struct vmbus_channel_message_header header;
696 struct vmbus_channel_initiate_contact {
697 struct vmbus_channel_message_header header;
698 u32 vmbus_version_requested;
705 struct vmbus_channel_version_response {
706 struct vmbus_channel_message_header header;
707 bool version_supported;
710 enum vmbus_channel_state {
712 CHANNEL_OPENING_STATE,
716 struct vmbus_channel_debug_info {
718 enum vmbus_channel_state state;
719 uuid_le interfacetype;
720 uuid_le interface_instance;
722 u32 servermonitor_pending;
723 u32 servermonitor_latency;
724 u32 servermonitor_connectionid;
725 u32 clientmonitor_pending;
726 u32 clientmonitor_latency;
727 u32 clientmonitor_connectionid;
729 struct hv_ring_buffer_debug_info inbound;
730 struct hv_ring_buffer_debug_info outbound;
734 * Represents each channel msg on the vmbus connection This is a
735 * variable-size data structure depending on the msg type itself
737 struct vmbus_channel_msginfo {
738 /* Bookkeeping stuff */
739 struct list_head msglistentry;
741 /* So far, this is only used to handle gpadl body message */
742 struct list_head submsglist;
744 /* Synchronize the request/response if needed */
745 struct completion waitevent;
747 struct vmbus_channel_version_supported version_supported;
748 struct vmbus_channel_open_result open_result;
749 struct vmbus_channel_gpadl_torndown gpadl_torndown;
750 struct vmbus_channel_gpadl_created gpadl_created;
751 struct vmbus_channel_version_response version_response;
756 * The channel message that goes out on the "wire".
757 * It will contain at minimum the VMBUS_CHANNEL_MESSAGE_HEADER header
759 unsigned char msg[0];
762 struct vmbus_close_msg {
763 struct vmbus_channel_msginfo info;
764 struct vmbus_channel_close_channel msg;
767 struct vmbus_channel {
768 struct list_head listentry;
770 struct hv_device *device_obj;
772 struct work_struct work;
774 enum vmbus_channel_state state;
776 struct vmbus_channel_offer_channel offermsg;
778 * These are based on the OfferMsg.MonitorId.
779 * Save it here for easy access.
784 u32 ringbuffer_gpadlhandle;
786 /* Allocated memory for ring buffer */
787 void *ringbuffer_pages;
788 u32 ringbuffer_pagecount;
789 struct hv_ring_buffer_info outbound; /* send to parent */
790 struct hv_ring_buffer_info inbound; /* receive from parent */
791 spinlock_t inbound_lock;
792 struct workqueue_struct *controlwq;
794 struct vmbus_close_msg close_msg;
796 /* Channel callback are invoked in this workqueue context */
797 /* HANDLE dataWorkQueue; */
799 void (*onchannel_callback)(void *context);
800 void *channel_callback_context;
803 void vmbus_onmessage(void *context);
805 int vmbus_request_offers(void);
807 /* The format must be the same as struct vmdata_gpa_direct */
808 struct vmbus_channel_packet_page_buffer {
816 struct hv_page_buffer range[MAX_PAGE_BUFFER_COUNT];
819 /* The format must be the same as struct vmdata_gpa_direct */
820 struct vmbus_channel_packet_multipage_buffer {
827 u32 rangecount; /* Always 1 in this case */
828 struct hv_multipage_buffer range;
832 extern int vmbus_open(struct vmbus_channel *channel,
833 u32 send_ringbuffersize,
834 u32 recv_ringbuffersize,
837 void(*onchannel_callback)(void *context),
840 extern void vmbus_close(struct vmbus_channel *channel);
842 extern int vmbus_sendpacket(struct vmbus_channel *channel,
846 enum vmbus_packet_type type,
849 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
850 struct hv_page_buffer pagebuffers[],
856 extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
857 struct hv_multipage_buffer *mpb,
862 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
867 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
870 extern int vmbus_recvpacket(struct vmbus_channel *channel,
873 u32 *buffer_actual_len,
876 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
879 u32 *buffer_actual_len,
883 extern void vmbus_get_debug_info(struct vmbus_channel *channel,
884 struct vmbus_channel_debug_info *debug);
886 extern void vmbus_ontimer(unsigned long data);
888 struct hv_dev_port_info {
892 u32 bytes_avail_toread;
893 u32 bytes_avail_towrite;
896 /* Base driver object */
900 /* the device type supported by this driver */
902 const struct hv_vmbus_device_id *id_table;
904 struct device_driver driver;
906 int (*probe)(struct hv_device *, const struct hv_vmbus_device_id *);
907 int (*remove)(struct hv_device *);
908 void (*shutdown)(struct hv_device *);
912 /* Base device object */
914 /* the device type id of this device */
917 /* the device instance id of this device */
918 uuid_le dev_instance;
920 struct device device;
922 struct vmbus_channel *channel;
926 static inline struct hv_device *device_to_hv_device(struct device *d)
928 return container_of(d, struct hv_device, device);
931 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
933 return container_of(d, struct hv_driver, driver);
936 static inline void hv_set_drvdata(struct hv_device *dev, void *data)
938 dev_set_drvdata(&dev->device, data);
941 static inline void *hv_get_drvdata(struct hv_device *dev)
943 return dev_get_drvdata(&dev->device);
946 /* Vmbus interface */
947 #define vmbus_driver_register(driver) \
948 __vmbus_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
949 int __must_check __vmbus_driver_register(struct hv_driver *hv_driver,
950 struct module *owner,
951 const char *mod_name);
952 void vmbus_driver_unregister(struct hv_driver *hv_driver);
955 * VMBUS_DEVICE - macro used to describe a specific hyperv vmbus device
957 * This macro is used to create a struct hv_vmbus_device_id that matches a
960 #define VMBUS_DEVICE(g0, g1, g2, g3, g4, g5, g6, g7, \
961 g8, g9, ga, gb, gc, gd, ge, gf) \
962 .guid = { g0, g1, g2, g3, g4, g5, g6, g7, \
963 g8, g9, ga, gb, gc, gd, ge, gf },
966 * Common header for Hyper-V ICs
969 #define ICMSGTYPE_NEGOTIATE 0
970 #define ICMSGTYPE_HEARTBEAT 1
971 #define ICMSGTYPE_KVPEXCHANGE 2
972 #define ICMSGTYPE_SHUTDOWN 3
973 #define ICMSGTYPE_TIMESYNC 4
974 #define ICMSGTYPE_VSS 5
976 #define ICMSGHDRFLAG_TRANSACTION 1
977 #define ICMSGHDRFLAG_REQUEST 2
978 #define ICMSGHDRFLAG_RESPONSE 4
980 #define HV_S_OK 0x00000000
981 #define HV_E_FAIL 0x80004005
982 #define HV_S_CONT 0x80070103
983 #define HV_ERROR_NOT_SUPPORTED 0x80070032
984 #define HV_ERROR_MACHINE_LOCKED 0x800704F7
987 * While we want to handle util services as regular devices,
988 * there is only one instance of each of these services; so
989 * we statically allocate the service specific state.
992 struct hv_util_service {
994 void (*util_cb)(void *);
995 int (*util_init)(struct hv_util_service *);
996 void (*util_deinit)(void);
999 struct vmbuspipe_hdr {
1010 struct ic_version icverframe;
1012 struct ic_version icvermsg;
1015 u8 ictransaction_id;
1020 struct icmsg_negotiate {
1024 struct ic_version icversion_data[1]; /* any size array */
1027 struct shutdown_msg_data {
1029 u32 timeout_seconds;
1031 u8 display_message[2048];
1034 struct heartbeat_msg_data {
1039 /* Time Sync IC defs */
1040 #define ICTIMESYNCFLAG_PROBE 0
1041 #define ICTIMESYNCFLAG_SYNC 1
1042 #define ICTIMESYNCFLAG_SAMPLE 2
1045 #define WLTIMEDELTA 116444736000000000L /* in 100ns unit */
1047 #define WLTIMEDELTA 116444736000000000LL
1050 struct ictimesync_data {
1057 struct hyperv_service_callback {
1061 struct vmbus_channel *channel;
1062 void (*callback) (void *context);
1065 #define MAX_SRV_VER 0x7ffffff
1066 extern void vmbus_prep_negotiate_resp(struct icmsg_hdr *,
1067 struct icmsg_negotiate *, u8 *, int,
1070 int hv_kvp_init(struct hv_util_service *);
1071 void hv_kvp_deinit(void);
1072 void hv_kvp_onchannelcallback(void *);
1074 #endif /* __KERNEL__ */
1075 #endif /* _HYPERV_H */